Malicious PDF — malware analysis report

Static analysis result for SHA-256 083f07770e4713fe…

MALICIOUS

PDF

43.1 KB Created: 2020-11-05 22:01:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0d39ef868c74d74242a444087b0c6749 SHA-1: 3cd86150ba075e34d6ef0f8ccbc2e763c7793c4f SHA-256: 083f07770e4713fe15ea455809e76c0529895beaea56d5a537fd1406e9c3050e
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, which is designed to lead users to potentially harmful content, in this case, a 'balanced body keto scam'. The ML classifier strongly indicated maliciousness, and the embedded URL is the primary indicator of this malicious intent. No scripts were extracted, but the presence of the malicious URL is sufficient to classify the document's purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/123?keyword=balanced+body+keto+scam In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_5f9ee697dc06d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419235/normal_5f9d57e600c7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381546/normal_5f9e8ba0d5f65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f8838f9ca6bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/female_jrotc_uniform_class_a.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/5054179237.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/graphic_designer_portfolio_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3cac4d0-fadb-47fe-a4c8-3467a4c8b782/71990116770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd96322-23dc-48a9-8c9c-193d206f19cb/39680354048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e684af79-e659-4c20-b285-b0a081cad11f/22745081939.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/proxim_o_definition_medical_terminology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac52a901-a996-4b4c-bc9e-6579fe1f1237/26138316111.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6980 5344 bytes
SHA-256: 30d96f4c8e146e719d661971214bc5a7d3725f8fe6d78bd08b64c8dc2d1b5207
font_01_sfnt_off00007ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA1 10540 bytes
SHA-256: 3b759d73114ed886fde342678d9eab61fbbe89c11712953be22bb15c95842d4e

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